Patents by Inventor Ronald Propper

Ronald Propper has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for preparation of .alpha.-tocopherol
    Patent number: 4208334
    Abstract: A process for producing .alpha.-tocopherol (Vitamin E) by condensing trimethylhydroquinone with either a phytol or an isophytol derivative thereof in the presence of trifluoroacetic acid.
    Type: Grant
    Filed: December 22, 1978
    Date of Patent: June 17, 1980
    Assignee: Hoffmann-La Roches Inc.
    Inventors: Peter Fitton, Ronald Propper